Article
Biotechnology & Applied Microbiology
Jose Diesel, Gary Molano, Gabriel J. Montecinos, Kelly Deweese, Sara Calhoun, Alan Kuo, Anna Lipzen, Asaf Salamov, Igor V. Grigoriev, Daniel C. Reed, Robert J. Miller, Sergey V. Nuzhdin, Filipe Alberto
Summary: The study presents a high-quality genome assembly of the giant kelp, Macrocystis pyrifera, using PacBio reads and Hi-C technology. The assembled genome is 537 MB in size, with 35 scaffolds and 188 contigs. Annotation of the genome identified 25,919 genes. Additionally, the study confirms the population structure of giant kelp using genetic variation data.
Article
Oceanography
Stephen G. Monismith, Maha W. Alnajjar, C. Brock Woodson, Charles A. Boch, Arturo Hernandez, Leonardo Vazquez-Vera, Tom W. Bell, Fiorenza Micheli
Summary: This study investigates the changes in currents near Isla Natividad, Baja California, due to the density of giant kelp biomass. It found that the coastal currents are more affected by kelp density compared to cross-shore flows.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Limnology
Sarah B. Traiger, Brian Cohn, Demetra Panos, Margaret Daly, Heidi K. Hirsh, Maria Martone, Isabella Gutierrez, David A. Mucciarone, Yuichiro Takeshita, Stephen G. Monismith, Robert B. Dunbar, Kerry J. Nickols
Summary: Research indicates that canopy-forming giant kelp can locally increase dissolved oxygen and pH in coastal ecosystems through photosynthesis. However, the limited spatial extent and magnitude of this effect suggest that kelp forests may have limited potential to mitigate acidification and hypoxia.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Stephen Monismith, Maha Alnajjar, Margaret Daly, Arnoldo Valle-Levinson, Braulio Juarez, Matheus Fagundes, Tom Bell, C. Brock Woodson
Summary: In this study, we propose an approach to estimate drag coefficients for tidal flows based on observed velocities and velocities without bottom friction. Using long-term measurements from Isla Nativdad, we find that kelp biomass has a significant effect on drag, while surface waves have little impact.
ESTUARIES AND COASTS
(2022)
Review
Biochemistry & Molecular Biology
Robert M. Pringle, Joel O. Abraham, T. Michael Anderson, Tyler C. Coverdale, Andrew B. Davies, Christopher L. Dutton, Angela Gaylard, Jacob R. Goheen, Ricardo M. Holdo, Matthew C. Hutchinson, Duncan M. Kimuyu, Ryan A. Long, Amanda L. Subalusky, Michiel P. Veldhuis
Summary: Large herbivores have significant ecological impacts, but research findings are often conflicting and uncertain. They consistently control plant dynamics, species composition, biomass, and suppress fires and smaller animal abundance. However, the effects on predation risk, trophic cascades, seed dispersal, and biogeochemistry are less clear. The role of body size in regulating ecological impact is important, and losing large-herbivore species will alter net impact.
Article
Plant Sciences
Salvador Zarco-Perello, Nestor E. Bosch, Scott Bennett, Mat A. Vanderklift, Thomas Wernberg
Summary: Global warming has led to the expansion of tropical herbivores and a tropicalization of temperate marine ecosystems, resulting in difficulties for kelp recovery. Tropical herbivores exert strong top-down control on turf seaweed and kelp.
JOURNAL OF ECOLOGY
(2021)
Article
Ecology
Sara T. Gonzalez, Filipe Alberto, Gary Molano
Summary: Different populations of giant kelp exhibit distinct morphological variations, but the mechanism and environmental drivers for this variation are unclear. This study used whole-genome sequencing and SNP markers to assess the genetic divergence between giant kelp and integrated kelp in Chile and California. The results showed that giant kelp and integrated kelp are genetically distinguishable, with separation between hemispheres and within hemispheres, indicating convergent evolution separately in each hemisphere. This study provides novel insights into the genetic divergence and evolution of giant kelp ecomorphs.
Review
Plant Sciences
Anurag A. Agrawal, John L. Maron
Summary: The long-term impact of insect herbivores on plant populations and communities remains unclear, but existing research suggests they can have important effects on plant abundance, competitive ability, and community structure.
JOURNAL OF ECOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Matias Araya, Jorge Rivas, Graciela Sepulveda, Camila Espinoza-Gonzalez, Sebastian Lira, Andres Meynard, Elodie Blanco, Nestor Escalona, Rosanna Ginocchio, Elizabeth Garrido-Ramirez, Loretto Contreras-Porcia
Summary: Seaweed biochar produced from Macrocystis pyrifera using slow pyrolysis process showed high efficiency in Cu2+ removal. Biochars produced at 600°C exhibited the highest surface areas and porosities. All biochars exhibited Langmuir behavior in adsorption isotherms, indicating a chemisorption process.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Marisol Garcia-Reyes, Sarah Ann Thompson, Laura Rogers-Bennett, William J. Sydeman
Summary: This study analyzed the relationship between bull kelp canopy cover and winter oceanographic conditions using a 20-year satellite dataset. The results showed that winter ocean conditions can predict summer kelp canopy cover, which is important for kelp restoration actions in California and elsewhere.
Article
Multidisciplinary Sciences
Henry F. Houskeeper, Isaac S. Rosenthal, Katherine C. Cavanaugh, Camille Pawlak, Laura Trouille, Jarrett E. K. Byrnes, Tom W. Bell, Kyle C. Cavanaugh
Summary: Giant kelp populations, which are essential for productive coastal ecosystems, are vulnerable to changing climate conditions and human impacts. This study presents two approaches for automating the detection of giant kelp using satellite imagery and applies them to the Falkland Islands. The results show no evidence of long-term change in giant kelp canopy area, but recent declines should be carefully monitored.
Article
Biotechnology & Applied Microbiology
Pamela A. Fernandez, Barbara Labbe, Juan D. Gaitan-Espitia, Catriona L. Hurd, Ellie R. Paine, Anusuya Willis, Craig Sanderson, Alejandro H. Buschmann
Summary: The distribution and productivity of seaweeds are influenced by changes in temperature and inorganic nitrogen availability. The effect of the nitrate: ammonium ratio on physiological traits and gametophyte development of Macrocystis was investigated, showing that NH4+ led to negative NO3- uptake rates and reduced growth rates. Different developmental stages and physiological traits may have varying thermal tolerance windows.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biodiversity Conservation
Luis Miguel Pardo, Claudia Andrade, Lisette Zenteno-Devaud, Bastian Garrido, Cristobal Rivera
Summary: The study investigates the feeding strategy of juvenile southern king crabs, revealing significant differences between cryptic and vagile individuals. Vagile individuals occupy a higher trophic position, suggesting a potential shift in dietary preference and increased cannibalism. No evidence of isotopic niche shift was found, indicating that juveniles of different sizes exploit similar food resources.
Article
Multidisciplinary Sciences
Tom C. Bell, Kyle F. Cavanaugh, Vienna Saccomanno, Katherine Cavanaugh, Henry Houskeeper, Norah Eddy, Falk Schuetzenmeister, Nathaniel Rindlaub, Mary Gleason
Summary: Giant kelp and bull kelp forests are facing increasing risks from marine heatwave events, herbivore outbreaks, and alterations in the behavior of key herbivore predators. To address the challenge of analyzing satellite imagery data of these forests, we created a web-based tool called Kelpwatch. It allows researchers and managers to quantify kelp forest change, assess historical trends, and facilitate effective kelp forest management.
Article
Multidisciplinary Sciences
Adam J. Schlenger, Rodrigo Beas-Luna, Richard F. Ambrose
Summary: Ocean acidification poses a significant threat to marine ecosystems, affecting different taxa in diverse ways and resulting in changes to ecosystem structure and stability. Research suggests that biodiversity and average trophic level decrease over time under acidification, while biomass of certain lower trophic level groups may increase.